On the identification of the double donor state of EL2 in p type GaAs A. Bencherifa, G. Brémond, A. Nouailhat, G. Guillot, A. Guivarc'h et A. Regreny Rev. Phys. Appl. (Paris), 22 8 (1987) 891-895 DOI: 10.1051/rphysap:01987002208089100